US4789049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Signal transmitting equipment for elevator
Assignee: Mitsubishi Electric Corp
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Filing: 1988-03-25
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Granted: 1988-12-06
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Expires: 2008-03-25
Abstract
Abstract This invention relates to an elevator signal transmitting equipment characterized in that a shielding body of a magnetic shielding material envelops a transmitting line laid along a shaft through which a cage travels and a portion of a coupling device extending toward said transmitting line, the transmission and reception of signals being realized through the magnetic coupling between said transmitting line and said coupling device to control the operation of said cage, a path through which a part of said coupling device travels being left not enveloped.
Inventors
- 👤 Eiki Watanabe
- 👤 Takesi Sakurada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:21
CPC Classifications
B; B66; B66B; B66B1/00; B66B1/34; B66B1/3415; B66B1/3446; H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/32; H01Q1/3208; H01Q1/3225; H04; H04B; H04B3/00; H04B3/60; H04B5/00; H04B5/20; H04B5/28
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
84 words
An elevator control signal transmitting equipment characterized in that a shielding body of a magnetic shielding material envelops a transmitting line laid along a shaft through which a cage travels and a portion of a coupling device extending toward said transmitting line, the transmission and reception of signals being realized through the magnetic coupling between said transmitting line and said coupling device to control the operation of said cage, a path through which a part of said coupling device travels being left not enveloped.
Claim 2
Dependent Claim
84 words
An elevator control signal transmitting equipment characterized in that a shielding body of a magnetic shielding material envelops a transmitting line laid along a shaft through which a cage travels and a portion of a coupling device extending toward said transmitting line, the transmission and reception of signals being realized through the magnetic coupling between said transmitting line and said coupling device to control the operation of said cage, a path through which a part of said coupling device travels being left not enveloped.
Claim 3
Dependent Claim
97 words
An elevator control signal transmitting equipment characterized in that the shielding body of the magnetic shielding material, whose interior surface is covered with the radio wave absorbing material stuck thereto, envelops a transmitting line laid along a shaft through which a cage travels and a portion of a coupling device extending toward said transmitting line, the transmission and reception of signals being realized through the magnetic coupling between said transmitting line and said coupling device to control the operation of said cage, a path through which a part of said coupling device travels being left not enveloped.
Claim 4
Dependent Claim
97 words
An elevator control signal transmitting equipment characterized in that the shielding body of the magnetic shielding material, whose interior surface is covered with the radio wave absorbing material stuck thereto, envelops a transmitting line laid along a shaft through which a cage travels and a portion of a coupling device extending toward said transmitting line, the transmission and reception of signals being realized through the magnetic coupling between said transmitting line and said coupling device to control the operation of said cage, a path through which a part of said coupling device travels being left not enveloped.
Claim 5
Dependent Claim
106 words
An elevator control signal transmitting equipment comprising a cage traveling through a shaft and containing an installed transceiver; a transmitting line laid lengthwise along said shaft; an antenna device connected to said transceiver installed in said cage and positioned toward said transmitting line for permitting the transmission and reception of signals to and from said transmitting line; a shielding body for magnetic shielding placed along said shaft, enveloping said transmitting line and an end portion of said antenna device, said body having a gap formed therein for providing a path for said antenna device, said antenna device following the ascending or descending movement of said cage.
Claim 6
Dependent Claim
106 words
An elevator control signal transmitting equipment comprising a cage traveling through a shaft and containing an installed transceiver; a transmitting line laid lengthwise along said shaft; an antenna device connected to said transceiver installed in said cage and positioned toward said transmitting line for permitting the transmission and reception of signals to and from said transmitting line; a shielding body for magnetic shielding placed along said shaft, enveloping said transmitting line and an end portion of said antenna device, said body having a gap formed therein for providing a path for said antenna device, said antenna device following the ascending or descending movement of said cage.
Claim 7
Dependent Claim
21 words
An elevator control signal transmitting equipment according to claim 3, characterized in that said transmitting line is a leakage coaxial cable.
Claim 8
Dependent Claim
30 words
An elevator control signal transmitting equipment according to claim 4, characterized in that slender penetrating slits are formed through a superficial covering of said leakage coaxial cable at regular intervals.
Claim 9
Dependent Claim
32 words
An elevator control signal transmitting equipment according to claim 4, characterized in that said antenna device is equipped with a dipole antenna positioned inside said shielding body along said leakage coaxial cable.
Claim 10
Dependent Claim
55 words
An elevator control signal transmitting equipment according to claim 6, characterized in that said leakage coaxial cable is connected to a transceiver installed inside a machine room, the transmission and reception of signal through the radio wave coupling between said leakage coaxial cable and said antenna device permitting to control the operation of said cage.
Claim 11
Dependent Claim
28 words
An elevator control signal transmitting equipment according to claim 6, characterized in that the interior surface of said shielding body is covered with the radio wave absorbing material.
Claim 12
Dependent Claim
22 words
An elevator control signal transmitting equipment according to claim 8, characterized in that said shielding body is made of an iron sheet.
Claim 13
Dependent Claim
41 words
An elevator control signal transmitting equipment according to claim 7, characterized in that said leakage coaxial cable and said antenna device are coupled by means of a 200 to 800 MHz weak radio wave through said penetrating slits of said cable.
Claim 14
Dependent Claim
31 words
An elevator control signal transmitting equipment according to claim 7, characterized in that a sliding device is installed in an engaging relationship with said gap to move slidingly through said gap.
Claim 15
Dependent Claim
25 words
An elevator control signal transmitting equipment according to claim 11, characterized in that said sliding device is fixed to said cage through a resilient support.
Claim 16
Dependent Claim
22 words
An elevator control signal transmitting equipment according to claim 3, characterized in that an inductive radio is used for said transmitting line.
Claim 17
Dependent Claim
24 words
An elevator control signal transmitting equipment according to claim 13, characterized in that said inductive radio employs a frequency of several times 100 KHz.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-12-06 | 1992-06-06 | 1992-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-12-06 | 1996-06-06 | 1996-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-12-06 | 2000-06-06 | 2000-12-06 | $7700.00 | Window Closed / Lapsed |